Recycled aggregate (RA) refers to the crushed remnants of previously used construction materials, such as concrete, bricks, and tiles, repurposed for use in new concrete. The mechanism underlying the production of recycled aggregates involves the collection, sorting, and crushing of demolition waste. This process aims to reduce the size of the debris into usable aggregates while attempting to maintain as much of the original quality as possible. However, recycled aggregates typically display a range of altered physical properties compared to virgin aggregates. These changes, including increased porosity and absorption capacity due to residual cement paste, influence how recycled aggregates interact with cement and water in new concrete mixtures. The presence of old cement paste can also affect the mechanical interlocking and chemical bonding within the concrete.